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(No Model.)

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ADJUSTABLE NIPPLE FOR ING ANDESOENT ELECTRIC LAMPS.

N0. 381;921. Patented May 1, 1888.

l y I ill? MF A WlT/VESSES:

UNITED STATES PATENT OFFICE.

EMIL F. GENNERT, OF BROOKLYN, NEW YORK.

ADJUSTABLE NIPPLE FOR INCANDESCENT ELECTRIC LAMPS.

SPECIFICATION forming part of Letters Patent No. 381,921, dated May 1, 1888.

Application filed December 2, 1887. Serial No. 256,730. No model.)

To'dZZ whom it may concern.-

Be it known that I, EMIL F. GENNERT, a citizen of the United States of America, and a resident of thecity of Brooklyn, Kings county, State of New York, have invented a new and useful Improvement in Adjustable Nipples for Incandescent Electric Lamps, of which the following is a specification.

My invention relates to appliances for incandescent electric lighting, the object being to provide a nipple on which to screw the lamp, which will be capable of adjustment at will to any required angle horizontal, vertical, or intermediate-this being in many instances a desirable thing to do, notably in the case where a lamp projecting horizontally from its holder is found to have an incandescing filament which droops and is liable to touch the glass and cause it to break. Again, whenever several lamps project from one holder or cluster and are surrounded by an outer globe it has heretofore been found necessary to remove the lamps from their nipples in order to remove or to place the outer globe, and then to replace them again inside the globe after it has been put in place, which is a very troublesome thing to do. Again, it is frequently desirable to adjust incandescent electric lamps to'particular angles, so as to get the best effect both in appearance and in light.

Myinvention is designed to fill the want felt in such cases as above stated; and it consists in the combination of abody-boss and nipple in such manner as to constituteajoint or pivoted device, through the interior of which an opening extends, which is adapted for the passage of wires for conducting electricity to and from the lamps.

It consists, also, in the combination of a yoke adapting a body-boss for attachment to intermediate places on a rod or tube.

In the accompanying drawings, which form part of this specification, Figure 1 represents a cluster body-boss having three nipples, the front nipple being shown in section.. Fig. 2 shows a side View of a single bodyboss, dotted lines outlining interior. Fig. 3 shows aside view of a body-boss adapted to clamp on a vertical rod or tube. Fig. 4 shows a side view of a body-boss adapted to clamp on a hori* zontal rod or tube. Fig. 5 is a cross-section of Fig. 4, the tube and socket being shown in central section.

Like letters are used to designatelike parts in each figure.

A is a portion of the pipes ordinarily used for conveying the conductingwires. B is the body-boss, which is secured thereto by any suitable means, a screwconnection, as shown, being preferable. Flanges b b, which are made in one piece with the boss B, may be made in any fanciful form suitable. They are, however, positioned parallel to each other at such distance apart as to adapt them as pivotal bearings for the nippleO, which is made substantially in the form shown and is pivoted between them in a manner to admit of free movement. One of the pivots D may be a set-screw, and adapted to serve for securing the nipple O rigidly in any position to which it may be adjusted; or, if it is preferred for that purpose, a snap spring, E, may be secured to the body-boss, and adapted with a pointed end to engage in the holes or countersinks in the sides of the nipple, as shown at f.

The free end of'the nipple C is adapted to receive and hold connected an incandescent electric lamp, such as the ordinary ones of commerce. An opening extends longitudinally through the nipple O and communicates with a similar opening through the body-boss, which in turn communicates with the interior of the pipes A, which convey the electric conducting-wires. These openings are adapted to serve as a passage for the electric conducting-wires through the joint formed by the pivoting of the nipple O to the body-boss B, and afford the facilities for making the proper connection between the wires of the pipes A and the wires of the incandescent electric lamp, where they will be covered and hidden by the parts forming the joint. nection to a cluster of lamps the two leadingin wires can be branched within the body-boss into as many pairs as there are nipples, and a pair of wires lead through each nipple, respectively, as there is ample room therein.

A modification adapting a body-boss for at tachment to any point on a rod or tube is shown by Figs. 3 and 4. The neck d, instead of 100 being formed into ahollow internally-threaded socket, is formed in yoke shape, as shown,

In making this conthus forming a half-round socket, H, adapted to partially embrace a rod or tube, and is provided with lugs J J, to which a detachable bar, 1', is adj ustably secured by means of set-screws kit. This bar is preferably semi-annular in form, having its ends turned out to form lugs J J, adapting it for the purpose. The mode of attaching it to a rod or tube is obvious and need not be stated; but I prefer to use between it and the rod or tube a ring of non-conducting material, as shown by L, so as to insulate the body-boss. wires enter the body-boss between the flanges b I), either above or below at the neck d.

It will be seen that an essential feature in my invention is construction of the parts, so that an open way extends through the interior of thejoint, articulating the body-boss B and the nipple 0, through which electric conducting-wires may be freely strung.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In lamp appliances for electric lighting, an adjustably-jointed lamp-holder consisting of the combination of a hollow body-boss and In this case the leading-in a hollow nipple adjust-ably pivoted together, the hollow of the one communicating with the hollow of the other, and constituting a pivoted joint, having an open way through its interior for free passage ofelectric conductingwires, substantially as described.

2. In lamp appliances for electric lighting, the combination ofa yoke adapted to embrace a rod or pipe, abody-boss provided with suitable means for the pivoted articulation of a nipple, and a hollow nipple adjustably pivoted to the said body-boss, the hollow of said nipple extending through the pivotal articulation and communicating with the hollow of the body-boss, forming an open way through the interior of thejoint for the free passage of electric conducting-wires, substantially as described.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 28th day of November, 1887.

EMIL F. GENNERT.

\Vitnesses:

F. W. BELMONT, H. R. MAssEY. 

